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<p>Models a CMAChromosomeof the elitist (MO-)CMA-ES that encodes strategy parameters.  
 <a href="structshark_1_1_c_m_a_chromosome.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="_chromosome_8h_source.html">shark/Algorithms/DirectSearch/CMA/Chromosome.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-types" name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a1f218363002ca2397630da815462d207" id="r_a1f218363002ca2397630da815462d207"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207">IndividualSuccess</a> { <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207a2658107652dbc18fa1dfc1561bbc9d8d">Successful</a> = 1
, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207a1f723904e22cffee4ff5181b75f590a4">Unsuccessful</a> = 2
, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207aab6c93c854b415c823070faca8878c12">Failure</a> = 3
 }</td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a3140075b6f17139924e0a45a3f0270b9" id="r_a3140075b6f17139924e0a45a3f0270b9"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a3140075b6f17139924e0a45a3f0270b9">CMAChromosome</a> ()</td></tr>
<tr class="separator:a3140075b6f17139924e0a45a3f0270b9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aba46843f3412c36f04ec4c01fc8eabd8" id="r_aba46843f3412c36f04ec4c01fc8eabd8"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome</a> (std::size_t searchSpaceDimension, double successThreshold, double initialStepSize)</td></tr>
<tr class="separator:aba46843f3412c36f04ec4c01fc8eabd8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6a24c38dcc70306f8204f4c83bdf59f1" id="r_a6a24c38dcc70306f8204f4c83bdf59f1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring</a> ()</td></tr>
<tr class="memdesc:a6a24c38dcc70306f8204f4c83bdf59f1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Updates a \((\mu+1)\)-MO-CMA-ES chromosome of an successful offspring individual. It is assumed that unsuccessful individuals are not selected for future mutation.  <br /></td></tr>
<tr class="separator:a6a24c38dcc70306f8204f4c83bdf59f1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a75bc2d00ca8b695014e3c94ff1063afa" id="r_a75bc2d00ca8b695014e3c94ff1063afa"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent</a> (<a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207">IndividualSuccess</a> offspringSuccess)</td></tr>
<tr class="memdesc:a75bc2d00ca8b695014e3c94ff1063afa"><td class="mdescLeft">&#160;</td><td class="mdescRight">Updates a \((\mu+1)\)-MO-CMA-ES chromosome of a parent individual.  <br /></td></tr>
<tr class="separator:a75bc2d00ca8b695014e3c94ff1063afa"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a02412ded01f20ad747d1eac66afb1d5a" id="r_a02412ded01f20ad747d1eac66afb1d5a"><td class="memTemplParams" colspan="2">template&lt;typename Archive &gt; </td></tr>
<tr class="memitem:a02412ded01f20ad747d1eac66afb1d5a"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize</a> (Archive &amp;archive, const unsigned int version)</td></tr>
<tr class="memdesc:a02412ded01f20ad747d1eac66afb1d5a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Serializes the CMAChromosometo the supplied archive.  <br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-attribs" name="pub-attribs"></a>
Public Attributes</h2></td></tr>
<tr class="memitem:a5cae82c29c7c3423e3141ec7934db090" id="r_a5cae82c29c7c3423e3141ec7934db090"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classshark_1_1_multi_variate_normal_distribution_cholesky.html">MultiVariateNormalDistributionCholesky</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a5cae82c29c7c3423e3141ec7934db090">m_mutationDistribution</a></td></tr>
<tr class="memdesc:a5cae82c29c7c3423e3141ec7934db090"><td class="mdescLeft">&#160;</td><td class="mdescRight">Models the search distribution using a cholsky matrix.  <br /></td></tr>
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<tr class="memitem:a6bf2c9b5df1dbaf02ebc2d4d353bda88" id="r_a6bf2c9b5df1dbaf02ebc2d4d353bda88"><td class="memItemLeft" align="right" valign="top">RealVector&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6bf2c9b5df1dbaf02ebc2d4d353bda88">m_evolutionPath</a></td></tr>
<tr class="memdesc:a6bf2c9b5df1dbaf02ebc2d4d353bda88"><td class="mdescLeft">&#160;</td><td class="mdescRight">Low-pass filtered accumulation of successful mutative steps.  <br /></td></tr>
<tr class="separator:a6bf2c9b5df1dbaf02ebc2d4d353bda88"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ada778d876f95126d15d8fffd0e569764" id="r_ada778d876f95126d15d8fffd0e569764"><td class="memItemLeft" align="right" valign="top">RealVector&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#ada778d876f95126d15d8fffd0e569764">m_lastStep</a></td></tr>
<tr class="memdesc:ada778d876f95126d15d8fffd0e569764"><td class="mdescLeft">&#160;</td><td class="mdescRight">The most recent mutative step.  <br /></td></tr>
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<tr class="memitem:a3b0339485d78e58d3cbebb0deb1a0ca5" id="r_a3b0339485d78e58d3cbebb0deb1a0ca5"><td class="memItemLeft" align="right" valign="top">RealVector&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a3b0339485d78e58d3cbebb0deb1a0ca5">m_lastZ</a></td></tr>
<tr class="memdesc:a3b0339485d78e58d3cbebb0deb1a0ca5"><td class="mdescLeft">&#160;</td><td class="mdescRight">The sample from N(0,I) that produced the last step.  <br /></td></tr>
<tr class="separator:a3b0339485d78e58d3cbebb0deb1a0ca5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6af1a949711f8816d6365a6c6391ee86" id="r_a6af1a949711f8816d6365a6c6391ee86"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6af1a949711f8816d6365a6c6391ee86">m_stepSize</a></td></tr>
<tr class="memdesc:a6af1a949711f8816d6365a6c6391ee86"><td class="mdescLeft">&#160;</td><td class="mdescRight">The step-size used to scale the normally-distributed mutative steps. Dynamically adapted during the run.  <br /></td></tr>
<tr class="separator:a6af1a949711f8816d6365a6c6391ee86"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a289c4958f7b199d93fdb40d6f26b66d6" id="r_a289c4958f7b199d93fdb40d6f26b66d6"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a289c4958f7b199d93fdb40d6f26b66d6">m_stepSizeDampingFactor</a></td></tr>
<tr class="memdesc:a289c4958f7b199d93fdb40d6f26b66d6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Damping factor \(d\) used in the step-size update procedure.  <br /></td></tr>
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<tr class="memitem:ac74fce75d02c73cc4280f891c860ee75" id="r_ac74fce75d02c73cc4280f891c860ee75"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#ac74fce75d02c73cc4280f891c860ee75">m_stepSizeLearningRate</a></td></tr>
<tr class="memdesc:ac74fce75d02c73cc4280f891c860ee75"><td class="mdescLeft">&#160;</td><td class="mdescRight">The learning rate for the step-size.  <br /></td></tr>
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<tr class="memitem:a022346615e7fe36b57acbf3f680e3bf0" id="r_a022346615e7fe36b57acbf3f680e3bf0"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a022346615e7fe36b57acbf3f680e3bf0">m_successProbability</a></td></tr>
<tr class="memdesc:a022346615e7fe36b57acbf3f680e3bf0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Current success probability of this parameter set.  <br /></td></tr>
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<tr class="memitem:a0b07c3150e6f2fe503e8707bfb017ead" id="r_a0b07c3150e6f2fe503e8707bfb017ead"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a0b07c3150e6f2fe503e8707bfb017ead">m_targetSuccessProbability</a></td></tr>
<tr class="memdesc:a0b07c3150e6f2fe503e8707bfb017ead"><td class="mdescLeft">&#160;</td><td class="mdescRight">Target success probability, close \( \frac{1}{5}\).  <br /></td></tr>
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<tr class="memitem:a89bd872d3d439e5108c49dfca3a27d2b" id="r_a89bd872d3d439e5108c49dfca3a27d2b"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a89bd872d3d439e5108c49dfca3a27d2b">m_evolutionPathLearningRate</a></td></tr>
<tr class="memdesc:a89bd872d3d439e5108c49dfca3a27d2b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Learning rate (constant) for updating the evolution path.  <br /></td></tr>
<tr class="separator:a89bd872d3d439e5108c49dfca3a27d2b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a20bac09c3fe5303052fda9eb6482f0d4" id="r_a20bac09c3fe5303052fda9eb6482f0d4"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a20bac09c3fe5303052fda9eb6482f0d4">m_covarianceMatrixLearningRate</a></td></tr>
<tr class="memdesc:a20bac09c3fe5303052fda9eb6482f0d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Learning rate (constant) for updating the covariance matrix.  <br /></td></tr>
<tr class="separator:a20bac09c3fe5303052fda9eb6482f0d4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4ef9704be8fe2674fe29e69e59a122dc" id="r_a4ef9704be8fe2674fe29e69e59a122dc"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a4ef9704be8fe2674fe29e69e59a122dc">m_covarianceMatrixUnlearningRate</a></td></tr>
<tr class="memdesc:a4ef9704be8fe2674fe29e69e59a122dc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Learning rate (constant) for unlearning unsuccessful directions from the covariance matrix.  <br /></td></tr>
<tr class="separator:a4ef9704be8fe2674fe29e69e59a122dc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab36738a46bad24a90a050702062d319c" id="r_ab36738a46bad24a90a050702062d319c"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#ab36738a46bad24a90a050702062d319c">m_successThreshold</a></td></tr>
<tr class="memdesc:ab36738a46bad24a90a050702062d319c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Success threshold \(p_{\text{thresh}}\) for cutting off evolution path updates.  <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Models a CMAChromosomeof the elitist (MO-)CMA-ES that encodes strategy parameters. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00042">42</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>
</div><h2 class="groupheader">Member Enumeration Documentation</h2>
<a id="a1f218363002ca2397630da815462d207" name="a1f218363002ca2397630da815462d207"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a1f218363002ca2397630da815462d207">&#9670;&#160;</a></span>IndividualSuccess</h2>

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          <td class="memname">enum <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207">shark::CMAChromosome::IndividualSuccess</a></td>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="a1f218363002ca2397630da815462d207a2658107652dbc18fa1dfc1561bbc9d8d" name="a1f218363002ca2397630da815462d207a2658107652dbc18fa1dfc1561bbc9d8d"></a>Successful&#160;</td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a1f218363002ca2397630da815462d207a1f723904e22cffee4ff5181b75f590a4" name="a1f218363002ca2397630da815462d207a1f723904e22cffee4ff5181b75f590a4"></a>Unsuccessful&#160;</td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a1f218363002ca2397630da815462d207aab6c93c854b415c823070faca8878c12" name="a1f218363002ca2397630da815462d207aab6c93c854b415c823070faca8878c12"></a>Failure&#160;</td><td class="fielddoc"></td></tr>
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<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00043">43</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

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<h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="a3140075b6f17139924e0a45a3f0270b9" name="a3140075b6f17139924e0a45a3f0270b9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a3140075b6f17139924e0a45a3f0270b9">&#9670;&#160;</a></span>CMAChromosome() <span class="overload">[1/2]</span></h2>

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          <td class="memname">shark::CMAChromosome::CMAChromosome </td>
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<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00065">65</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#aba46843f3412c36f04ec4c01fc8eabd8">&#9670;&#160;</a></span>CMAChromosome() <span class="overload">[2/2]</span></h2>

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          <td>(</td>
          <td class="paramtype">std::size_t&#160;</td>
          <td class="paramname"><em>searchSpaceDimension</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>successThreshold</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>initialStepSize</em>&#160;</td>
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          <td>)</td>
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<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00066">66</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">References <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a20bac09c3fe5303052fda9eb6482f0d4">m_covarianceMatrixLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a4ef9704be8fe2674fe29e69e59a122dc">m_covarianceMatrixUnlearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6bf2c9b5df1dbaf02ebc2d4d353bda88">m_evolutionPath</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a89bd872d3d439e5108c49dfca3a27d2b">m_evolutionPathLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ada778d876f95126d15d8fffd0e569764">m_lastStep</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a3b0339485d78e58d3cbebb0deb1a0ca5">m_lastZ</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a5cae82c29c7c3423e3141ec7934db090">m_mutationDistribution</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a289c4958f7b199d93fdb40d6f26b66d6">m_stepSizeDampingFactor</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ac74fce75d02c73cc4280f891c860ee75">m_stepSizeLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a022346615e7fe36b57acbf3f680e3bf0">m_successProbability</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a0b07c3150e6f2fe503e8707bfb017ead">m_targetSuccessProbability</a>, <a class="el" href="classshark_1_1_multi_variate_normal_distribution_cholesky.html#a3282df396618643594c4e4e5ea932862">shark::MultiVariateNormalDistributionCholesky::resize()</a>, and <a class="el" href="group__shark__globals.html#gae1f82613484173e9fe1a07960dabff63">shark::sqr()</a>.</p>

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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a02412ded01f20ad747d1eac66afb1d5a">&#9670;&#160;</a></span>serialize()</h2>

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template&lt;typename Archive &gt; </div>
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          <td>(</td>
          <td class="paramtype">Archive &amp;&#160;</td>
          <td class="paramname"><em>archive</em>, </td>
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          <td class="paramname"><em>version</em>&#160;</td>
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<p>Serializes the CMAChromosometo the supplied archive. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
  <table class="tparams">
    <tr><td class="paramname">Archive</td><td>The type of the archive the CMAChromosomeshall be serialized to. </td></tr>
  </table>
  </dd>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">archive</td><td>The archive to serialize to. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">version</td><td>Version information (optional and not used here). </td></tr>
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<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00151">151</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">References <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a20bac09c3fe5303052fda9eb6482f0d4">m_covarianceMatrixLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a4ef9704be8fe2674fe29e69e59a122dc">m_covarianceMatrixUnlearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6bf2c9b5df1dbaf02ebc2d4d353bda88">m_evolutionPath</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a89bd872d3d439e5108c49dfca3a27d2b">m_evolutionPathLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ada778d876f95126d15d8fffd0e569764">m_lastStep</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a5cae82c29c7c3423e3141ec7934db090">m_mutationDistribution</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6af1a949711f8816d6365a6c6391ee86">m_stepSize</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a289c4958f7b199d93fdb40d6f26b66d6">m_stepSizeDampingFactor</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ac74fce75d02c73cc4280f891c860ee75">m_stepSizeLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a022346615e7fe36b57acbf3f680e3bf0">m_successProbability</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ab36738a46bad24a90a050702062d319c">m_successThreshold</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a0b07c3150e6f2fe503e8707bfb017ead">m_targetSuccessProbability</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a6a24c38dcc70306f8204f4c83bdf59f1">&#9670;&#160;</a></span>updateAsOffspring()</h2>

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          <td class="memname">void shark::CMAChromosome::updateAsOffspring </td>
          <td>(</td>
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<p>Updates a \((\mu+1)\)-MO-CMA-ES chromosome of an successful offspring individual. It is assumed that unsuccessful individuals are not selected for future mutation. </p>
<p>Updates strategy parameters according to:  </p><p class="formulaDsp">
\begin{align*}
  \bar{p}_{\text{succ}} &amp; \leftarrow &amp; (1-c_p)\bar{p}_{\text{succ}} + c_p \\
  \sigma &amp; \leftarrow &amp; \sigma \cdot e^{\frac{1}{d}\frac{\bar{p}_{\text{succ}} - p^{\text{target}}_{\text{succ}}}{1-p^{\text{target}}_{\text{succ}}}}\\
  \vec{p}_c &amp; \leftarrow &amp; (1-c_c) \vec{p}_c + \mathbb{1}_{\bar{p}_{\text{succ}} &lt; p_{\text{thresh}}} \sqrt{c_c (2 - c_c)} \vec{x}_{\text{step}} \\
  \vec{C} &amp; \leftarrow &amp; (1-c_{\text{cov}}) \vec{C} + c_{\text{cov}} \left(  \vec{p}_c \vec{p}_c^T + \mathbb{1}_{\bar{p}_{\text{succ}} \geq p_{\text{thresh}}} c_c (2 - c_c) \vec{C} \right)
\end{align*}
</p>
 
<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00100">100</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">References <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a20bac09c3fe5303052fda9eb6482f0d4">m_covarianceMatrixLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6bf2c9b5df1dbaf02ebc2d4d353bda88">m_evolutionPath</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a89bd872d3d439e5108c49dfca3a27d2b">m_evolutionPathLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ada778d876f95126d15d8fffd0e569764">m_lastStep</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6af1a949711f8816d6365a6c6391ee86">m_stepSize</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a289c4958f7b199d93fdb40d6f26b66d6">m_stepSizeDampingFactor</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ac74fce75d02c73cc4280f891c860ee75">m_stepSizeLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a022346615e7fe36b57acbf3f680e3bf0">m_successProbability</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ab36738a46bad24a90a050702062d319c">m_successThreshold</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a0b07c3150e6f2fe503e8707bfb017ead">m_targetSuccessProbability</a>.</p>

<p class="reference">Referenced by <a class="el" href="classshark_1_1_c_m_a_individual.html#a287e59ca98935bfed544b810e844e2f8">shark::CMAIndividual&lt; FitnessType &gt;::updateAsOffspring()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a75bc2d00ca8b695014e3c94ff1063afa">&#9670;&#160;</a></span>updateAsParent()</h2>

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          <td class="memname">void shark::CMAChromosome::updateAsParent </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207">IndividualSuccess</a>&#160;</td>
          <td class="paramname"><em>offspringSuccess</em></td><td>)</td>
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<p>Updates a \((\mu+1)\)-MO-CMA-ES chromosome of a parent individual. </p>
<p>This is called when the parent individual survived the last selection process. The update process depends now on how the offspring fares: It can be successful, unsuccesful or a complete failure.</p>
<p>Based on whether it is succesful or not, the global stepsize is adapted as for the child. In the case of a failure the direction of that individual is actively purged from the Covariance matrix to make this offspring less likely. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00123">123</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">References <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207aab6c93c854b415c823070faca8878c12">Failure</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a4ef9704be8fe2674fe29e69e59a122dc">m_covarianceMatrixUnlearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ada778d876f95126d15d8fffd0e569764">m_lastStep</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a3b0339485d78e58d3cbebb0deb1a0ca5">m_lastZ</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6af1a949711f8816d6365a6c6391ee86">m_stepSize</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a289c4958f7b199d93fdb40d6f26b66d6">m_stepSizeDampingFactor</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ac74fce75d02c73cc4280f891c860ee75">m_stepSizeLearningRate</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a022346615e7fe36b57acbf3f680e3bf0">m_successProbability</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#ab36738a46bad24a90a050702062d319c">m_successThreshold</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a0b07c3150e6f2fe503e8707bfb017ead">m_targetSuccessProbability</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a1f218363002ca2397630da815462d207a2658107652dbc18fa1dfc1561bbc9d8d">Successful</a>.</p>

<p class="reference">Referenced by <a class="el" href="classshark_1_1_c_m_a_individual.html#a3f2aab9d92622e0e0e1104f2abcb06ee">shark::CMAIndividual&lt; FitnessType &gt;::updateAsParent()</a>.</p>

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<h2 class="groupheader">Member Data Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a20bac09c3fe5303052fda9eb6482f0d4">&#9670;&#160;</a></span>m_covarianceMatrixLearningRate</h2>

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          <td class="memname">double shark::CMAChromosome::m_covarianceMatrixLearningRate</td>
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<p>Learning rate (constant) for updating the covariance matrix. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00060">60</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>.</p>

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<a id="a4ef9704be8fe2674fe29e69e59a122dc" name="a4ef9704be8fe2674fe29e69e59a122dc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4ef9704be8fe2674fe29e69e59a122dc">&#9670;&#160;</a></span>m_covarianceMatrixUnlearningRate</h2>

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          <td class="memname">double shark::CMAChromosome::m_covarianceMatrixUnlearningRate</td>
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<p>Learning rate (constant) for unlearning unsuccessful directions from the covariance matrix. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00061">61</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a6bf2c9b5df1dbaf02ebc2d4d353bda88">&#9670;&#160;</a></span>m_evolutionPath</h2>

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          <td class="memname">RealVector shark::CMAChromosome::m_evolutionPath</td>
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<p>Low-pass filtered accumulation of successful mutative steps. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00050">50</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a89bd872d3d439e5108c49dfca3a27d2b">&#9670;&#160;</a></span>m_evolutionPathLearningRate</h2>

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<p>Learning rate (constant) for updating the evolution path. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00059">59</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>.</p>

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<a id="ada778d876f95126d15d8fffd0e569764" name="ada778d876f95126d15d8fffd0e569764"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ada778d876f95126d15d8fffd0e569764">&#9670;&#160;</a></span>m_lastStep</h2>

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<p>The most recent mutative step. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00051">51</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="classshark_1_1_c_m_a_individual.html#a7cb81d9d266d24f1bfc336da863084f9">shark::CMAIndividual&lt; FitnessType &gt;::mutate()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a3b0339485d78e58d3cbebb0deb1a0ca5">&#9670;&#160;</a></span>m_lastZ</h2>

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<p>The sample from N(0,I) that produced the last step. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00052">52</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a5cae82c29c7c3423e3141ec7934db090">&#9670;&#160;</a></span>m_mutationDistribution</h2>

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          <td class="memname"><a class="el" href="classshark_1_1_multi_variate_normal_distribution_cholesky.html">MultiVariateNormalDistributionCholesky</a> shark::CMAChromosome::m_mutationDistribution</td>
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<p>Models the search distribution using a cholsky matrix. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00048">48</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="classshark_1_1_c_m_a_individual.html#a7cb81d9d266d24f1bfc336da863084f9">shark::CMAIndividual&lt; FitnessType &gt;::mutate()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a6af1a949711f8816d6365a6c6391ee86">&#9670;&#160;</a></span>m_stepSize</h2>

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          <td class="memname">double shark::CMAChromosome::m_stepSize</td>
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<p>The step-size used to scale the normally-distributed mutative steps. Dynamically adapted during the run. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00054">54</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="classshark_1_1_c_m_a_individual.html#a7cb81d9d266d24f1bfc336da863084f9">shark::CMAIndividual&lt; FitnessType &gt;::mutate()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a289c4958f7b199d93fdb40d6f26b66d6">&#9670;&#160;</a></span>m_stepSizeDampingFactor</h2>

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          <td class="memname">double shark::CMAChromosome::m_stepSizeDampingFactor</td>
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<p>Damping factor \(d\) used in the step-size update procedure. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00055">55</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ac74fce75d02c73cc4280f891c860ee75">&#9670;&#160;</a></span>m_stepSizeLearningRate</h2>

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          <td class="memname">double shark::CMAChromosome::m_stepSizeLearningRate</td>
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<p>The learning rate for the step-size. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00056">56</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a022346615e7fe36b57acbf3f680e3bf0">&#9670;&#160;</a></span>m_successProbability</h2>

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<p>Current success probability of this parameter set. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00057">57</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ab36738a46bad24a90a050702062d319c">&#9670;&#160;</a></span>m_successThreshold</h2>

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          <td class="memname">double shark::CMAChromosome::m_successThreshold</td>
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<p>Success threshold \(p_{\text{thresh}}\) for cutting off evolution path updates. </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00063">63</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a0b07c3150e6f2fe503e8707bfb017ead">&#9670;&#160;</a></span>m_targetSuccessProbability</h2>

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          <td class="memname">double shark::CMAChromosome::m_targetSuccessProbability</td>
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<p>Target success probability, close \( \frac{1}{5}\). </p>

<p class="definition">Definition at line <a class="el" href="_chromosome_8h_source.html#l00058">58</a> of file <a class="el" href="_chromosome_8h_source.html">Chromosome.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="structshark_1_1_c_m_a_chromosome.html#aba46843f3412c36f04ec4c01fc8eabd8">CMAChromosome()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a02412ded01f20ad747d1eac66afb1d5a">serialize()</a>, <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a6a24c38dcc70306f8204f4c83bdf59f1">updateAsOffspring()</a>, and <a class="el" href="structshark_1_1_c_m_a_chromosome.html#a75bc2d00ca8b695014e3c94ff1063afa">updateAsParent()</a>.</p>

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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>include/shark/Algorithms/DirectSearch/CMA/<a class="el" href="_chromosome_8h_source.html">Chromosome.h</a></li>
</ul>
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